define(function(require, exports, module){

    (function(exports) {
      var process = { EventEmitter: function() {} };

      if (typeof Array.isArray !== "function"){
        Array.isArray = function(obj){ return Object.prototype.toString.call(obj) === "[object Array]" };
      }

      if (!Array.prototype.indexOf){
        Array.prototype.indexOf = function(item){
            for ( var i = 0, length = this.length; i < length; i++ ) {
                if ( this[ i ] === item ) {
                    return i;
                }
            }

            return -1;
        };
      }

      // Begin wrap of nodejs implementation of EventEmitter

      var EventEmitter = exports.EventEmitter = process.EventEmitter;

      var isArray = Array.isArray;

      EventEmitter.prototype.emit = function(type) {
        // If there is no 'error' event listener then throw.
        if (type === 'error') {
          if (!this._events || !this._events.error ||
              (isArray(this._events.error) && !this._events.error.length))
          {
            if (arguments[1] instanceof Error) {
              throw arguments[1]; // Unhandled 'error' event
            } else {
              throw new Error("Uncaught, unspecified 'error' event.");
            }
            return false;
          }
        }

        if (!this._events) return false;
        var handler = this._events[type];
        if (!handler) return false;

        if (typeof handler == 'function') {
          switch (arguments.length) {
            // fast cases
            case 1:
              handler.call(this);
              break;
            case 2:
              handler.call(this, arguments[1]);
              break;
            case 3:
              handler.call(this, arguments[1], arguments[2]);
              break;
            // slower
            default:
              var args = Array.prototype.slice.call(arguments, 1);
              handler.apply(this, args);
          }
          return true;

        } else if (isArray(handler)) {
          var args = Array.prototype.slice.call(arguments, 1);

          var listeners = handler.slice();
          for (var i = 0, l = listeners.length; i < l; i++) {
            listeners[i].apply(this, args);
          }
          return true;

        } else {
          return false;
        }
      };

      // EventEmitter is defined in src/node_events.cc
      // EventEmitter.prototype.emit() is also defined there.
      EventEmitter.prototype.addListener = function(type, listener) {
        if ('function' !== typeof listener) {
          throw new Error('addListener only takes instances of Function');
        }

        if (!this._events) this._events = {};

        // To avoid recursion in the case that type == "newListeners"! Before
        // adding it to the listeners, first emit "newListeners".
        this.emit('newListener', type, listener);

        if (!this._events[type]) {
          // Optimize the case of one listener. Don't need the extra array object.
          this._events[type] = listener;
        } else if (isArray(this._events[type])) {
          // If we've already got an array, just append.
          this._events[type].push(listener);
        } else {
          // Adding the second element, need to change to array.
          this._events[type] = [this._events[type], listener];
        }

        return this;
      };

      EventEmitter.prototype.on = EventEmitter.prototype.addListener;

      EventEmitter.prototype.once = function(type, listener) {
        var self = this;
        self.on(type, function g() {
          self.removeListener(type, g);
          listener.apply(this, arguments);
        });
      };

      EventEmitter.prototype.removeListener = function(type, listener) {
        if ('function' !== typeof listener) {
          throw new Error('removeListener only takes instances of Function');
        }

        // does not use listeners(), so no side effect of creating _events[type]
        if (!this._events || !this._events[type]) return this;

        var list = this._events[type];

        if (isArray(list)) {
          var i = list.indexOf(listener);
          if (i < 0) return this;
          list.splice(i, 1);
          if (list.length == 0)
            delete this._events[type];
        } else if (this._events[type] === listener) {
          delete this._events[type];
        }

        return this;
      };

      EventEmitter.prototype.removeAllListeners = function(type) {
        // does not use listeners(), so no side effect of creating _events[type]
        if (type && this._events && this._events[type]) this._events[type] = null;
        return this;
      };

      EventEmitter.prototype.listeners = function(type) {
        if (!this._events) this._events = {};
        if (!this._events[type]) this._events[type] = [];
        if (!isArray(this._events[type])) {
          this._events[type] = [this._events[type]];
        }
        return this._events[type];
      };

      // End nodejs implementation
    }((typeof exports === 'undefined') ? window : exports));

});